Home / 3,856.35-5,316.79-3,147.46

Finding the Fourth Proportional to 3,856.35, 5,316.79 and 3,147.46

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Solution

The fourth proportional to 3,856.35, 5,316.79 and 3,147.46 is: 4,339.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.35 : 5,316.79 = 3,147.46 : x
  2. Step 2: Convert to fraction form
    3,856.35/5,316.79 = 3,147.46/x
  3. Step 3: Cross multiply
    3,856.35x = 5,316.79 × 3,147.46
  4. Step 4: Simplify right side
    3,856.35x = 16,734,389.28
  5. Step 5: Solve for x
    x = 16,734,389.28/3,856.35
  6. Step 6: Final answer
    x = 4,339.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.